Hidrología de los Andes del Norte - Hyna

URI permanente para esta comunidad

https://hdl.handle.net/10784/765

El grupo de Ciencias del Mar se enfoca en el estudio de los procesos litorales y su impacto en el medio ambiente y la sociedad, generando soluciones de peso que mitiguen los efectos colaterales de estos procesos en las personas y los ecosistemas.

Líneas de investigación: Hidrogeología; Oceanografía Ambiental; Mecánica del Paisaje.
Código Minciencias: COL0000185.
Categoría 2019: A1.
Escuela: Ciencias.
Departamento académico: Ciencias de la Tierra.
Coordinadora: Juan Darío Restrepo Ángel.
Correo electrónico: jdrestre@eafit.edu.co

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Mostrando 1 - 3 de 3

Historical and recent shore erosion along the Colombian Caribbean Coast
(COASTAL EDUCATION & RESEARCH FOUNDATION, INC., 2005) Correa-Arango, Ivan D.; Alcántara-Carrió, J; González R., D.A; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Ciencias del Mar
The analysis of historical charts, aerial photographs, satellite images and fieldwork provides a general picture of the magnitudes, rates and some of the possible causes of the main shoreline changes occurred along the littoral since 1794 until present. Net littoral accretion took place mostly on localized deltaic zones, but cliff and beach retreat has been by far the dominant trend in this coast, particularly along the coastline to the south of Sierra Nevada de Santa Marta. Data concerning the Guajira Peninsula and Sierra Nevada de Santa Marta shores suggest a coastline retreat of 20-30 m in the last century, while for the southern Caribbean, between the Magdalena delta and the Gulf of Urabá, accurate charts of XVIII-XIX centuries evidence littoral retreat up to 12 km and maximum rates of erosion up to 40 myr-1 at some areas. Shore erosion and consequent flooding along the Caribbean coast of Colombia had induced important land losses, both in non-developed and developed areas, and is impacting severely the infrastructure of all the inhabited littoral sectors. Available data for the most critical areas demonstrates that natural instability and/or pre-existing erosive trends are facilitated by soft lithologies and were dramatically accelerated in the last eight decades by intensive human interventions, including the chaotic building up of hard rock coastal defenses, the diversion of low river courses and the intensive beach and river sand extraction.
Predicción de las magnitudes de retroceso de algunos sectores acantilados de Antioquia en condiciones de ascenso del nivel del mar – Resultados para el sector de Arboletes
(Sociedad Colombiana de Ingeniería, 2012-08-08) Paniagua, Juan F.; Correa-Arango, Ivan D.; Universidad EAFIT. Departamento de Ingeniería; Ivan D. Correa-Arango (icorrea@.eafit.edu.co); Juan Felipe Paniagua (jpaniag2@eafit.edu.co); Ciencias del Mar
Sea-level rise related impacts are required for coastal management, especially within littoral fringes with active tectonics and presence of strategic ecosystems likewise Colombian southern Caribbean. “Worst” scenarios predict a sea-level rise for 2100 circa 2 m above level of 1990. Among this context, retreat magnitudes prediction of littoral cliffs of Antioquia, formed along several sectors by soft rocks, is a primary element for medium-large term planning of the region. Considering this, possible shoreline positions along three critical sectors within Antioquia’s coast for 50 years in the future are presented (Arboletes and Turbo towns) and Los Córdobas – Puerto Rey sector (Córdoba department). For the Arboletes sector, considered as the most critical based on population density and present infrastructure, results for 2059 indicate the following: 1) Assuming a constant sea-level rise rate of +2.32 mm/yr (present value), mean shoreline retreat to 2059 would be –64 m. 2) Assuming a sea-level rise rate of +7 mm/yr, mean retreat distances would be about 134 m. 3) Assuming a sea-level rise rate of +22 mm/yr, mean shoreline retreat distances would be 200 m. Mean shoreline retreat distances between 64 and 200 m to 2059 are related to primary magnitude impacts over present infrastructure of Arboletes sector (downtown structures, access roads from Montería and towards Necoclí towns) and also the associated marine inundation of natural drainages, primarily Jobo and Arboletes rivers. Similar results could be shown for the other sectors considered within this study
Shore erosion between Arboletes and Punta San Bernardo, caribbean coast of Colombia
(Universidad Industrial de Santander, 2007-07-02) Correa-Arango, Ivan D.; Ríos, A; González, D; Toro, M; Ojeda, G; Restrepo, L; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Ciencias del Mar
The present morphology and the inventory of the historical shoreline changes (1938-2005) between Arboletes and Punta San Bernardo evidenced a strong erosional trend along 160 of its 180lan tota1-1ength, resulting in the disparition/retreat of numerous beaches, followed by the consequent flooding/erosion of the adjacent littoral terraces and mangrove swamps. In general terms, the littoral Arbo1etes-Punta San Bernardo retreated 30 to 100m during the last seven decades, at rates between 0.5 and 1.5 m/year; maximum values were found at some critical sectors in the Arboletes-Punta Brava shore segment where magnitudes of coastline retreat were in the order of 900-1.500m at erosion rates up to 70 m/year during the period 19601975. Shore erosion in the study area results both from marine and subaerial processes and the combination of geological factors (neotectonism and effects of mud diapirism, minor stocks of sands, relative sea level rise, poor geotechnical characteristics of cliff's rocks) and human interventions (intensive sand mining from beaches and rivers, land uses with inadequate water management practices, adverse effects of groins and other rigid structures of defense). The precise definition of each one of these factors is necessary for planning the development of the area considering the future sea level rise associated to the Global Climate Change.

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Examinando Hidrología de los Andes del Norte - Hyna por Materia "ACANTILADOS"

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